Machine and bolt woeks



(No Mbdel.)

0. STILES. DIE'FOR FORMING PULLBY QE'NTERS.

Patented Mar. 4

UNiTED Stains met.

Arena NORMAN O. STILES, OF .MIDDLETOW N, CONNECTICUT, ASSIGNOR TOTHE INDIANAPOLIS MACHINE AND BOLT \VORKS, OF INDIANAPOLTS, IND.

DIE FOR FORMING PULLEY-CENTERS SPECIFICATION forming part of Letters Patent No. 294,698, dated March 4, 1884.

Application filed June 23, 1883. (No model.)

In all whom it may concern:

Be it known that I, NORMAN .0. STILns, of Middletown, in the county of Middlesex and State ofConnecticut, have invented a new Improvement in Dies for Forming Pulley-Centers; and I do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon,to be a full, clear, and exact description IO of the same, and which said drawings constitute part of this specification, and represent,

Figure l, a face View of one part of the die; Fig. 2, a vertical section through the two parts,

showing in the disk in place for operation; Fig. 3, a top view of the one part, showing the disk in place for operation; Fig. 4, a vertical section after the dies are closed and the ears turned up and down; 5, a perspective view of the center complete.

This invention relates to an improvement in dies for shaping the centers of that class of pulleys which are made with awroughtmetal center having the rim secured thereto.

2 5 This center consists of a corrugated disk having right-angular projections at its periphery,

the projections alternating the one projection from one side and the other upon the oppo site, and as seen in perspective, Fig. 5, the

object of the invention being the construction of dies whereby the disk may be shaped and the ears or projections turned in their respective directions; and in such dies my invention consists.

The two parts, A B, of the die are substantially alike. They are circular in form, and each constructed with alternate projections and recesses, a 1), around the edge, the space within these projections corresponding to the circumference of the center to be formed.

The surface of the die within these projections is concentrically corrugated, as seen in Figs.

1 and 2. The recesses. Z) are slightly larger than the proj ections, and so that the projections on the one part will correspond to the recesses on the other part, and so that the two will set together, as seen in Fig. i, the projections on one passing down into the recesses on the other. until the surfaces of the two parts may substantially meet. The face of the one part within the projections is the reverse of the other-that is, the concentric ribs on the one correspond to theconcentric depressions on the other, as seen in Figs. 2 and 4.

The blank 0 is cut from sheet metal, so as to form projections e f around its periphery, corresponding in number to the recesses and projections on the dies. The blank thus cut, as seen in Fig. 3, is laid upon the die-say with the projections e resting on the projec- 6o tions to of the part A of the die, the projections f lying over the recesses b, and so that the blank 0 will be supported, as seen in Fig.

2, in a concentric position on the die. Then the part B is forced down onto the blank,

the projections'a. on the part A turn the pro jections or ears 6 upward, and the projections e on the other part B turn the ears f down into the recesses in the lower part, thus turning alternate ears, one in one direction and the next in the opposite direction, and at substantially right angles to the plane of the disk, and as seen in Fig. 5. At the same time the disk is concentrically corrugated, and the pulley-center is complete, ready to receive its rim. While the concentric corrugation is desirable, as giving strength to the center, it may be left plain or be otherwise corrugated, the essential feature of my invention being the pair of dies, each having projections (1 8o alternating with recesses, the projections on the one corresponding to the recesses in the other, whereby the ears on the disk may be alternately turned the one to the right and the other to the left of the plane of the disk. 8 5

I clain1 j 1. The hereindescribed dies for forming wrought-metal pulley-centers, consisting of the two parts A B, each having a series of projections, a, alternating with recesses b 0 around its edge, leaving a circular space with in them corresponding substantially to the diameter of the center to be produced, the projections a on the one corresponding to the recesses b on the other part, and whereby the 5 ears on the edge of the center or disk may be turned alternately to the right and left of the plane of the disk, substantially as described.

2. The herein-described dies for forming edge of the center or disk may be turned al- 10 wroughtmetal pulleycenters, consisting of ternately to the right and left of the plane of the two parts A B, each having aseries of pro the disk, the circular space within the said jeetions, a, alternating with recesses 1) around projections concentricallycorrugated,substau- 5 its edge, leaving a circular space within them t-ially as described.

corresponding substantially to the diameter of the center to be produced, the projections (t on the one corresponding to the recesses b on the other part, and whereby the ears on the NORMAN C. STILES. \Vitnesses:

S. A. ROBINSON, SAMUEL L. XVARNER. 

